Q45tech wrote:To my knowlege the injector rings are not viton only front and rear main and the valve stem seals.
The only things I've ever added to fuel are isopropyl alcohol, Techron, and BG44K*........however who knows what the 300 + chemicals have been in gasoline over the past 16 years.
I remember reading that the injector o-rings are Buna-n. I used MMO in the fuel during the few months that BG44K wasn't available through Joe and I'm thinking it was the cause of my injector o-ring problems and missing pintle caps. Worked great in the oil though. Add a pint, drive for a day and change the oil and filter.
I've spent about 10 years of my career in chemical plant operation and rebuilding valves for rocket engines and I know first hand that the wrong chemical (acetone) with the wrong o-rings and seals (rubber/neoprene?) can swell or melt everything rubber in the system. Wouldn't it be nice to replace every seal and o-ring with Kalrez and Viton. I agree with you that even though the instructions on the bottle said to add to the fuel it was probably not the best choice.
BTW- I wonder what using acetone as an additive is doing to the fuel system.